update repo
update .gitignore
PHP homework-1 (data.db)
PHP homework-1 (index.php)
PHP homework-1 (form.php)
PHP homework-2 (users.db)
PHP homework-2 (assets)
PHP homework-2 (index.php)
PHP homework-2 (users)
PHP homework-2 (upload)
PHP homework-3 (sql)
PHP homework-3 (assets)
PHP homework-3 (index)
PHP homework-3 (register)
PHP homework-3 (messages)
PHP homework-4 (sql)
PHP homework-4 (index)
PHP homework-4 (books)
PHP homework-4 (authors)
PHP homework-4 (assets)